松辽盆地北部西斜坡区稠油成因与油源关系

松辽盆地北部西斜坡区分布的稠油资源是油气勘探的潜在领域。油藏流体地球化学分析表明，该地区稠油形成主要与厌氧细菌的生物降解作用有关。稠油的高温气相色谱分析，可以把稠油划分为2种成因类型、5个亚类。生物降解成因类型包括严重降解稠油、中等降解稠油和轻度降解稠油3个亚类；混合成因类型包括降解原油与原油蒸馏轻烃混合形成的稠油和降解原油与未降解原油混合形成的稠油2个亚类。生物标志化合物参数揭示的油岩关系表明，稠油来自斜坡东部的齐家—古龙凹陷的成熟烃源岩和该地区的未熟—低熟烃源岩，优越的油源条件为该地区稠油勘探展示了广阔前景。

Formation of heavy oil and correlation of oil-source in the western slope of the northern Songliao Basin

A general geochemical analysis for the liquids of heavy oil reservoir show that the formation of heavy oil in this area is mainly associated with biodegradation of anti oxygen bacteriea. The heavy oils can be divided into two types and five sub types. The first type is biodegraded heavy oil that include three sub types, serious, middle and light biodegraded oils. The second type is mixed heavy oils that contain two sub types, mixture of oil and biodegraded oil, mixture of light hydrocarbon from oil evaporation and biodegraded oil. Comparing the biomarkers of oils and source rock, the heavy oils in the slope derive separately from matured source rock in Qijia Gulong depression and low matured source rock in the slope. The condition of abundant oil resource presents a good exploration prospect of heavy oils in the slope.